Product Overview
In the world of physics, the Greek letter rho "?" represents the unit of Optical Density. RHOdium, is a component of the "Platinum Group of Metals" on the periodic table of the elements.

The Schneider-KREUZNACH RHOdium Full Spectrum Neutral Density (FSND) filters are a high-end ND filter line made specifically for the critical colour standards of 4K, 6K, and 8K resolution cameras.

Major advancements in 4K, 6K and 8K digital sensors have resulted in fewer issues with IR leakage compared to digital cameras of the past. However, these imaging sensors can still be subject to IR leakage within the far-red component of the visible spectrum, as well as the near IR. Therefore, IR absorption continues to be a requirement, particularly at optical densities of 1.2 and higher. Schneider-KREUZNACH RHOdium FSND filters answers the cinematographer's call for a truly neutral ND that controls the IR within the full visible spectrum and into the near infra-red.

RHOdium FSND filters are manufactured to finer flatness/parallelism specifications than ever before. These new filters help resolve even the finest detail. Schneider-KREUZNACH has engineered an extremely thin neutral density interlayer sandwiched between two sheets of crystal-clear SCHOTT water-white glass. The thin interlayer results in excellent transmitted wavefront flatness/parallelism. Additionally the coating is kept safe from abrasions by being encapsulated between the glass, rather than on the surface, thereby withstanding the rigors of the rental market.

RHOdiums are the first filters to undergo a lab-tested tristimulus scan, a more critical colour measurement than methods previously used to measure filter quality. This method verifies neutrality by utilizing a colorimetric algorithm that compares samples to perfectly neutral light. The result is unprecedented accuracy.

Cinematographers and photographers working with the latest in digital image capture technology, or even with film, will find the FSND filters wonderfully suited for all of their Neutral Density needs by keeping the visible spectrum completely in control.Features
• Even response throughout the visible colour spectrum and into the IR. • ND material is sandwiched between the glass, rather than coated on the outside of the glass, resulting in the inability to damage to the effect of the filter. • Available in a total of 10 stops from 0.3 to 3.0 in 1/3rd stop increments. • Lab tested via Tristimulus scans that utilize colorimetric algorithm, verifying accurate neutrality.